Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Superior you can figure out when to plant gayfeather by referring to the USDA zone info.

Planting Calendar for Gayfeather

Frost tolerance for gayfeather:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

You can plant gayfeather quite a bit earlier in the year because they are very cold tolerant.

The earliest that you can plant gayfeather in Superior is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant gayfeather and expect a good harvest is probably August. You probably don't want to wait any later than that or else your gayfeather may not have a chance to grow to maturity. You can get started a little bit earlier by starting your gayfeather indoors.

Last Frost Date

The average date of last frost is May 15 in Superior. It might get as low as -25°F during the coldest months of winter.

It's important to remember that USDA zone info for Superior is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Superior you get a frost after May 15 so be sure to be ready to protect your gayfeather in the event of one of those late frosts.

USDA Zone Info for Superior

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Superior

You may be interested in your other planting guides for Superior.